A new street is built

[Sproket]

A new street is built with one hundred new houses, numbered 1 to 100. How many number 9's are required to number all the houses?

 

[Chrisbee]

100

 

[Chrisbee]

Too early for me, try 20?

 

[Dustydog]

22

 

[Gary-Yorks]

24

 

[ValA.]

11

1 each for 9, 19, 29, 39, 49, 59, 69, 79, 89, and two for 99

 

[Chrisbee]

11

1 each for 9, 19, 29, 39, 49, 59, 69, 79, 89, and two for 99

What about 90,91,92,93,94,95,96,97,98 ?

 

[Dustydog]

What if they use the "9s" upside down for "6s"??

 

[Chrisbee]

What if they use the "9s" upside down for "6s"??

Then it would be 40

 

[Sproket]

Crisbee

Got it ....... @ 06.01 am

Not 10 (people forget the 90), not 11 (people forget the 90's): The answer is 20: 9,19,29,39,49,59,69,79,89,90,91,92,93,94,95,96,97,98,99(99's 1st digit),99(99's 2nd digit).

 

[ValA.]

11

1 each for 9, 19, 29, 39, 49, 59, 69, 79, 89, and two for 99

Doh - you can tell I had a bad night!!!!!!!